{"product_id":"alpha-1-1-4-or-1-3-8-dry-core-bits-for-granite-eng-stone","title":"Alpha 1-1\/4\" or 1-3\/8\" Dry Core Bits for Granite\/Eng. Stone","description":"\u003ch2 style=\"color:#231F20; font-size:28px; margin-bottom:18px;\"\u003eAlpha® Dry Core Bits for Granite, Engineered Stone \u0026amp; Porcelain\u003c\/h2\u003e\u003cp style=\"color:#231F20; font-size:15px; line-height:1.7;\"\u003eAlpha® Dry Core Bits are designed for job-site drilling of faucet, soap-dispenser and air-gap holes in granite, engineered stone, porcelain and crystallized-glass countertops — without water. They thread directly onto a high-speed angle grinder with a 5\/8\"-11 spindle and use Vacuum Brazed diamond on the side of the barrel with undercut protection, giving aggressive cutting action and stable, clean-walled holes. The 4\"-long barrel sets the maximum stone thickness a new bit can drill through.\u003c\/p\u003e\u003ch4 style=\"color:#F15C22; font-size:18px; margin-top:30px;\"\u003eFeatures\u003c\/h4\u003e\u003cul style=\"color:#231F20; font-size:14px; line-height:1.8;\"\u003e\n\u003cli\u003eDesigned for jobsite drilling of faucet-mounting holes in countertops and vanities\u003c\/li\u003e\n\u003cli\u003eVery fast cutting on granite, quartzite and engineered stone\u003c\/li\u003e\n\u003cli\u003eConvenient dry application — no water, no slurry, minimal cleanup\u003c\/li\u003e\n\u003cli\u003eHigh-quality, aggressive Vacuum Brazed diamond construction\u003c\/li\u003e\n\u003cli\u003eMakes clean, rounded corners for square or rectangular sinkholes\u003c\/li\u003e\n\u003cli\u003eVersatile for water, gas and electrical piping pass-throughs\u003c\/li\u003e\n\u003cli\u003eFits most popular high-speed grinders with a 5\/8\"-11 spindle\u003c\/li\u003e\n\u003cli\u003eUndercut protection on the side keeps drilling stable and easier\u003c\/li\u003e\n\u003c\/ul\u003e\u003cstyle\u003e\n.dst-accordion { margin-top: 25px; border: 1px solid #FDDCC5; border-radius: 6px; overflow: hidden; }\n.dst-accordion-item { border-bottom: 1px solid #FDDCC5; }\n.dst-accordion-item:last-child { border-bottom: none; }\n.dst-accordion-toggle { display: none; }\n.dst-accordion-label { display: flex; justify-content: space-between; align-items: center; padding: 14px 20px; cursor: pointer; font-size: 17px; font-weight: 700; color: #231F20; background: #fff; transition: background 0.2s; }\n.dst-accordion-label:hover { background: #FFF3EB; }\n.dst-accordion-label::after { content: '+'; font-size: 22px; font-weight: 700; color: #F15C22; transition: transform 0.3s; }\n.dst-accordion-toggle:checked + .dst-accordion-label { background: #FFF3EB; }\n.dst-accordion-toggle:checked + .dst-accordion-label::after { content: '\\2212'; }\n.dst-accordion-content { max-height: 0; overflow: hidden; transition: max-height 0.4s ease; padding: 0 20px; background: #fff; }\n.dst-accordion-toggle:checked ~ .dst-accordion-content { max-height: 5000px; padding: 15px 20px 20px; }\n\u003c\/style\u003e\u003cdiv class=\"dst-accordion\"\u003e\n\u003cdiv class=\"dst-accordion-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"acc-alpha-dry-core-bits-models\" class=\"dst-accordion-toggle\" checked\u003e\u003clabel for=\"acc-alpha-dry-core-bits-models\" class=\"dst-accordion-label\"\u003eModels \/ Part Numbers\u003c\/label\u003e\u003cdiv class=\"dst-accordion-content\"\u003e\u003ctable style=\"width:100%; border-collapse:collapse; color:#231F20; font-size:14px;\"\u003e\n\u003cthead\u003e\u003ctr style=\"background:#FFF8F3;\"\u003e\n\u003cth style=\"padding:8px 12px; text-align:left; border-bottom:2px solid #F15C22;\"\u003ePart No.\u003c\/th\u003e\n\u003cth style=\"padding:8px 12px; text-align:left; border-bottom:2px solid #F15C22;\"\u003eDiameter\u003c\/th\u003e\n\u003cth style=\"padding:8px 12px; text-align:left; border-bottom:2px solid #F15C22;\"\u003eThread\u003c\/th\u003e\n\u003cth style=\"padding:8px 12px; text-align:left; border-bottom:2px solid #F15C22;\"\u003eMax RPM\u003c\/th\u003e\n\u003cth style=\"padding:8px 12px; text-align:left; border-bottom:2px solid #F15C22;\"\u003eUPC\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003eDRB00500\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e1\/2\"\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e5\/8\"-11\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e12,000 RPM\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e749173461330\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003eDRB00750\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e3\/4\"\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e5\/8\"-11\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e12,000 RPM\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e749173461347\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003eDRB01000\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e1\"\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e5\/8\"-11\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e12,000 RPM\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e749173460715\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003eDRB01250 †\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e1-1\/4\"\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e5\/8\"-11\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e12,000 RPM\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e749173460722\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003eDRB01375\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e1-3\/8\"\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e5\/8\"-11\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e12,000 RPM\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e749173460739\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003eDRB01500\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e1-1\/2\"\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e5\/8\"-11\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e12,000 RPM\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e749173460746\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003eDRB02000\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e2\"\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e5\/8\"-11\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e12,000 RPM\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px; border-bottom:1px solid #FDDCC5;\"\u003e749173461354\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dst-accordion-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"acc-alpha-dry-core-bits-howto\" class=\"dst-accordion-toggle\"\u003e\u003clabel for=\"acc-alpha-dry-core-bits-howto\" class=\"dst-accordion-label\"\u003eHow to Use\u003c\/label\u003e\u003cdiv class=\"dst-accordion-content\"\u003e\u003col style=\"color:#231F20; font-size:14px; line-height:1.8;\"\u003e\n\u003cli\u003eSelect the Dry Core Bit diameter that matches your hole spec (1\/2\" through 2\").\u003c\/li\u003e\n\u003cli\u003eThread the bit fully onto a 5\/8\"-11 high-speed angle grinder spindle.\u003c\/li\u003e\n\u003cli\u003eClamp a granite, engineered-stone or composite template on top of the workpiece, polished side toward the workpiece, to guide the bit.\u003c\/li\u003e\n\u003cli\u003eStart at a tilt to bite a crescent, then bring the bit upright once the kerf is established.\u003c\/li\u003e\n\u003cli\u003eRun between 6,000 and 12,000 RPM — never exceed 12,000 RPM and never run below 6,000 RPM.\u003c\/li\u003e\n\u003cli\u003eUse light, steady pressure; let the diamond do the cutting. Pause periodically to clear dust and cool the bit.\u003c\/li\u003e\n\u003cli\u003eDry use is intended, but wet cutting is recommended whenever water is available — it extends bit life and reduces dust.\u003c\/li\u003e\n\u003cli\u003eMaximum drillable thickness equals the 4\" barrel length when the bit is new.\u003c\/li\u003e\n\u003c\/ol\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dst-accordion-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"acc-alpha-dry-core-bits-variant-specs\" class=\"dst-accordion-toggle\"\u003e\u003clabel for=\"acc-alpha-dry-core-bits-variant-specs\" class=\"dst-accordion-label\"\u003eSpecifications by Variant\u003c\/label\u003e\u003cdiv class=\"dst-accordion-content\"\u003e\n\u003cdiv style=\"margin-top:18px; padding:14px 16px; border:1px solid #FDDCC5; border-radius:6px; background:#FFF8F3;\"\u003e\n\u003ch5 style=\"margin:0 0 10px 0; color:#F15C22; font-size:16px;\"\u003e1-1\/4\" — Dry Core Bit — DRB01250\u003c\/h5\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse; color:#231F20; font-size:14px;\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; font-weight:bold; width:40%;\"\u003ePart No.\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;\"\u003eDRB01250\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFF3EB;\"\u003e\n\u003ctd style=\"padding:6px 10px; font-weight:bold; width:40%;\"\u003eUPC\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;\"\u003e749173460722\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; font-weight:bold; width:40%;\"\u003eSize\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;\"\u003e1-1\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFF3EB;\"\u003e\n\u003ctd style=\"padding:6px 10px; font-weight:bold; width:40%;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;\"\u003eDry Core Bit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; font-weight:bold; width:40%;\"\u003eThread\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;\"\u003e5\/8\"-11\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFF3EB;\"\u003e\n\u003ctd style=\"padding:6px 10px; font-weight:bold; width:40%;\"\u003eMax RPM\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;\"\u003e12,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; font-weight:bold; width:40%;\"\u003eRecommended For\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;\"\u003eGranite, Engineered Stone, Porcelain, Crystallized Glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFF3EB;\"\u003e\n\u003ctd style=\"padding:6px 10px; font-weight:bold; width:40%;\"\u003ePackaged Weight\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;\"\u003e0.70 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; font-weight:bold; width:40%;\"\u003ePackage Dimensions\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;\"\u003e6.25\" x 1.75\" x 1.75\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFF3EB;\"\u003e\n\u003ctd style=\"padding:6px 10px; font-weight:bold; width:40%;\"\u003eCommodity Code\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;\"\u003e8207.19.3060\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; font-weight:bold; width:40%;\"\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;\"\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-top:18px; padding:14px 16px; border:1px solid #FDDCC5; border-radius:6px; background:#FFF8F3;\"\u003e\n\u003ch5 style=\"margin:0 0 10px 0; color:#F15C22; font-size:16px;\"\u003e1-3\/8\" — Dry Core Bit — DRB01375\u003c\/h5\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse; color:#231F20; font-size:14px;\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; font-weight:bold; width:40%;\"\u003ePart No.\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;\"\u003eDRB01375\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFF3EB;\"\u003e\n\u003ctd style=\"padding:6px 10px; font-weight:bold; width:40%;\"\u003eUPC\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;\"\u003e749173460739\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; font-weight:bold; width:40%;\"\u003eSize\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;\"\u003e1-3\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFF3EB;\"\u003e\n\u003ctd style=\"padding:6px 10px; font-weight:bold; width:40%;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;\"\u003eDry Core Bit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; font-weight:bold; width:40%;\"\u003eThread\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;\"\u003e5\/8\"-11\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFF3EB;\"\u003e\n\u003ctd style=\"padding:6px 10px; font-weight:bold; width:40%;\"\u003eMax RPM\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;\"\u003e12,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; font-weight:bold; width:40%;\"\u003eRecommended For\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;\"\u003eGranite, Engineered Stone, Porcelain, Crystallized Glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFF3EB;\"\u003e\n\u003ctd style=\"padding:6px 10px; font-weight:bold; width:40%;\"\u003ePackaged Weight\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;\"\u003e0.70 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; font-weight:bold; width:40%;\"\u003ePackage Dimensions\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;\"\u003e6.25\" x 1.75\" x 1.75\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background:#FFF3EB;\"\u003e\n\u003ctd style=\"padding:6px 10px; font-weight:bold; width:40%;\"\u003eCommodity Code\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;\"\u003e8207.19.3060\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:6px 10px; font-weight:bold; width:40%;\"\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd style=\"padding:6px 10px;\"\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dst-accordion-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"acc-alpha-dry-core-bits-common-specs\" class=\"dst-accordion-toggle\"\u003e\u003clabel for=\"acc-alpha-dry-core-bits-common-specs\" class=\"dst-accordion-label\"\u003eCommon Specifications\u003c\/label\u003e\u003cdiv class=\"dst-accordion-content\"\u003e\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\" style=\"border-collapse:collapse; width:100%; border-color:#FDDCC5; font-size:14px;\"\u003e\n\u003ctr style=\"background-color:#F15C22; color:#fff;\"\u003e\n\u003cth style=\"padding:8px 12px; text-align:left;\"\u003eProperty\u003c\/th\u003e\n\u003cth style=\"padding:8px 12px; text-align:left;\"\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:bold; width:40%;\"\u003eApplication\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003eDry (wet use also permitted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#FFF3EB;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:bold; width:40%;\"\u003eDrive\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003e5\/8\"-11 Female Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:bold; width:40%;\"\u003eMaximum RPM\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003e12,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#FFF3EB;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:bold; width:40%;\"\u003eMinimum RPM\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003e6,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:bold; width:40%;\"\u003eBarrel Length\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003e4\" (maximum drilling depth when new)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#FFF3EB;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:bold; width:40%;\"\u003eDiamond Technology\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003eVacuum Brazed with sintered segment and undercut protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:bold; width:40%;\"\u003eMaterials\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003eGranite, Engineered Stone, Porcelain, Crystallized Glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color:#FFF3EB;\"\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:bold; width:40%;\"\u003eNot Recommended For\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003eMarble (too soft — dry-drill heat may crack the slab)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:8px 12px; font-weight:bold; width:40%;\"\u003eCountry of Origin\u003c\/td\u003e\n\u003ctd style=\"padding:8px 12px;\"\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dst-accordion-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"acc-alpha-dry-core-bits-related\" class=\"dst-accordion-toggle\"\u003e\u003clabel for=\"acc-alpha-dry-core-bits-related\" class=\"dst-accordion-label\"\u003eRelated \u0026amp; Companion Products\u003c\/label\u003e\u003cdiv class=\"dst-accordion-content\"\u003e\u003cul style=\"color:#231F20; font-size:14px; line-height:1.8;\"\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.dynamicstonetools.com\/collections\/alpha-core-bits\" target=\"_blank\" style=\"color:#F15C22;\"\u003eAlpha® Wet Core Bits\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.dynamicstonetools.com\/collections\/drill-bits\" target=\"_blank\" style=\"color:#F15C22;\"\u003eAlpha® Diamond Drill Bits Collection\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.dynamicstonetools.com\/collections\/grinders-polishers\" target=\"_blank\" style=\"color:#F15C22;\"\u003eAlpha® Angle Grinders \u0026amp; Polishers\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dst-accordion-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"acc-alpha-dry-core-bits-faqs\" class=\"dst-accordion-toggle\"\u003e\u003clabel for=\"acc-alpha-dry-core-bits-faqs\" class=\"dst-accordion-label\"\u003eFAQs\u003c\/label\u003e\u003cdiv class=\"dst-accordion-content\"\u003e\n\u003cdetails style=\"margin-bottom:8px; padding:10px 14px; background:#FFF8F3; border-left:3px solid #F15C22; border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer; font-weight:600; color:#231F20; font-size:14px;\"\u003eWhat materials can be core-drilled with Alpha® Dry Core Bits?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0 0; color:#231F20; font-size:14px;\"\u003eThey are designed for granite, engineered stone and porcelain slab materials, and also work on crystallized glass.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"margin-bottom:8px; padding:10px 14px; background:#FFF8F3; border-left:3px solid #F15C22; border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer; font-weight:600; color:#231F20; font-size:14px;\"\u003eCan I use the Dry Core Bits on marble?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0 0; color:#231F20; font-size:14px;\"\u003eNo. Marble is too soft; the heat generated by dry drilling can crack the material.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"margin-bottom:8px; padding:10px 14px; background:#FFF8F3; border-left:3px solid #F15C22; border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer; font-weight:600; color:#231F20; font-size:14px;\"\u003eCan the Dry Core Bits be used wet?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0 0; color:#231F20; font-size:14px;\"\u003eYes. They are designed for dry use, but wet cutting is recommended whenever possible to extend bit life and control dust.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"margin-bottom:8px; padding:10px 14px; background:#FFF8F3; border-left:3px solid #F15C22; border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer; font-weight:600; color:#231F20; font-size:14px;\"\u003eWhat is the maximum RPM for these bits?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0 0; color:#231F20; font-size:14px;\"\u003eDo not exceed 12,000 RPM.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"margin-bottom:8px; padding:10px 14px; background:#FFF8F3; border-left:3px solid #F15C22; border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer; font-weight:600; color:#231F20; font-size:14px;\"\u003eWhat is the minimum recommended RPM?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0 0; color:#231F20; font-size:14px;\"\u003eDo not run below 6,000 RPM. Slow speeds cause polishing instead of cutting and shorten bit life.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"margin-bottom:8px; padding:10px 14px; background:#FFF8F3; border-left:3px solid #F15C22; border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer; font-weight:600; color:#231F20; font-size:14px;\"\u003eCan I use these on a wet polisher?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0 0; color:#231F20; font-size:14px;\"\u003eNo. Wet polishers run at roughly 2,000–4,000 RPM — too slow for Dry Core Bits. Use a high-speed angle grinder.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"margin-bottom:8px; padding:10px 14px; background:#FFF8F3; border-left:3px solid #F15C22; border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer; font-weight:600; color:#231F20; font-size:14px;\"\u003eWhat kind of template should I use?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0 0; color:#231F20; font-size:14px;\"\u003eA template made from granite, engineered stone or composite. Secure it with clamps, polished side facing the workpiece, to guide the bit and prevent walking.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"margin-bottom:8px; padding:10px 14px; background:#FFF8F3; border-left:3px solid #F15C22; border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer; font-weight:600; color:#231F20; font-size:14px;\"\u003eWhat stone thickness can these bits drill through?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0 0; color:#231F20; font-size:14px;\"\u003eUp to 4\" when the bit is new — the barrel length is the limiting factor.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"margin-bottom:8px; padding:10px 14px; background:#FFF8F3; border-left:3px solid #F15C22; border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer; font-weight:600; color:#231F20; font-size:14px;\"\u003eWhy are there diamonds on the side of the core?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0 0; color:#231F20; font-size:14px;\"\u003eThe side diamonds combined with the sintered segment and undercut protection make the drilling action easier, more stable and less prone to binding.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails style=\"margin-bottom:8px; padding:10px 14px; background:#FFF8F3; border-left:3px solid #F15C22; border-radius:4px;\"\u003e\u003csummary style=\"cursor:pointer; font-weight:600; color:#231F20; font-size:14px;\"\u003eWhat sizes are available?\u003c\/summary\u003e\u003cp style=\"margin:8px 0 0 0; color:#231F20; font-size:14px;\"\u003eSix standard sizes ship from the factory: 1\/2\", 3\/4\", 1\", 1-3\/8\", 1-1\/2\" and 2\". A 1-1\/4\" option (DRB01250) is also stocked at DST.\u003c\/p\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dst-accordion-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"acc-alpha-dry-core-bits-videos\" class=\"dst-accordion-toggle\"\u003e\u003clabel for=\"acc-alpha-dry-core-bits-videos\" class=\"dst-accordion-label\"\u003eVideos\u003c\/label\u003e\u003cdiv class=\"dst-accordion-content\"\u003e\u003cdiv style=\"display:grid; grid-template-columns:repeat(auto-fit,minmax(280px,1fr)); gap:14px;\"\u003e\n\u003cdiv\u003e\n\u003cp style=\"margin:0 0 6px 0; color:#231F20; font-weight:600; font-size:14px;\"\u003eAngle Grinder with Dry Core Bit\u003c\/p\u003e\n\u003ciframe width=\"100%\" height=\"220\" src=\"https:\/\/www.youtube.com\/embed\/CFAvkvhtWLM\" frameborder=\"0\" allowfullscreen style=\"max-width:100%; border-radius:6px;\"\u003e\u003c\/iframe\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp style=\"margin:0 0 6px 0; color:#231F20; font-weight:600; font-size:14px;\"\u003eHow to Cut Internal Corners\u003c\/p\u003e\n\u003ciframe width=\"100%\" height=\"220\" src=\"https:\/\/www.youtube.com\/embed\/6A2U-oFTym4\" frameborder=\"0\" allowfullscreen style=\"max-width:100%; border-radius:6px;\"\u003e\u003c\/iframe\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp style=\"margin:0 0 6px 0; color:#231F20; font-weight:600; font-size:14px;\"\u003eAngle Grinder with Dry Core Bit on Granite\u003c\/p\u003e\n\u003ciframe width=\"100%\" height=\"220\" src=\"https:\/\/www.youtube.com\/embed\/pfWS1VjESdU\" frameborder=\"0\" allowfullscreen style=\"max-width:100%; border-radius:6px;\"\u003e\u003c\/iframe\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp style=\"margin:0 0 6px 0; color:#231F20; font-weight:600; font-size:14px;\"\u003eHow to Work on Porcelain Paver Tiles\u003c\/p\u003e\n\u003ciframe width=\"100%\" height=\"220\" src=\"https:\/\/www.youtube.com\/embed\/hS08yF3eb9c\" frameborder=\"0\" allowfullscreen style=\"max-width:100%; border-radius:6px;\"\u003e\u003c\/iframe\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dst-accordion-item\"\u003e\n\u003cinput type=\"checkbox\" id=\"acc-alpha-dry-core-bits-docs\" class=\"dst-accordion-toggle\"\u003e\u003clabel for=\"acc-alpha-dry-core-bits-docs\" class=\"dst-accordion-label\"\u003eDocumentation\u003c\/label\u003e\u003cdiv class=\"dst-accordion-content\"\u003e\u003cul style=\"list-style:none; padding-left:0;\"\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.alpha-tools.com\/Files\/Docs\/Reference\/PDFs\/Dry-Core-Bits_HelpfulHints.pdf\" target=\"_blank\" style=\"color:#F15C22;\"\u003e📄 Dry Core Bits — Helpful Hints\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.alpha-tools.com\/Files\/Docs\/Reference\/PDFs\/Dry-Core-Bits_HowToUse.pdf\" target=\"_blank\" style=\"color:#F15C22;\"\u003e📄 Dry Core Bits — How To Use\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.alpha-tools.com\/Files\/Docs\/Flyers\/PDFs\/Dry-Core-Bits_flyer.pdf\" target=\"_blank\" style=\"color:#F15C22;\"\u003e📄 Dry Core Bits Flyer\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.alpha-tools.com\/Files\/Docs\/Flyers\/PDFs\/Porcelain-Paver-Tiles_flyer.pdf\" target=\"_blank\" style=\"color:#F15C22;\"\u003e📄 Porcelain Paver Tiles Flyer\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.alpha-tools.com\/Files\/Docs\/Flyers\/PDFs\/Hardscape-Blade-Chart.pdf\" target=\"_blank\" style=\"color:#F15C22;\"\u003e📄 Hardscape Blade Chart\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/www.alpha-tools.com\/Files\/Docs\/SDS\/PDFs\/525_Diamond-Tools-Core-Boring-Bit_sds.pdf\" target=\"_blank\" style=\"color:#F15C22;\"\u003e📄 Safety Data Sheet — Diamond Core Boring Bit\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\u003cp style=\"margin-top:24px; padding:14px 18px; background:#FFF8F3; border-left:4px solid #F15C22; color:#231F20; font-size:14px;\"\u003e\u003cstrong\u003e⚠ WARNING:\u003c\/strong\u003e Cancer and Reproductive Harm — \u003ca href=\"https:\/\/www.P65Warnings.ca.gov\" target=\"_blank\" style=\"color:#F15C22;\"\u003ewww.P65Warnings.ca.gov\u003c\/a\u003e. Always wear appropriate PPE.\u003c\/p\u003e","brand":"Dynamic Stone Tools","offers":[{"title":"1-1\/4\"","offer_id":68010632151315,"sku":"DRB01250","price":98.13,"currency_code":"USD","in_stock":true},{"title":"1-3\/8\"","offer_id":68010632184083,"sku":"DRB01375","price":110.4,"currency_code":"USD","in_stock":true},{"title":"1\/2\"","offer_id":68010632216851,"sku":"DRB00500","price":94.55,"currency_code":"USD","in_stock":false},{"title":"3\/4\"","offer_id":68010632249619,"sku":"DRB00750","price":96.95,"currency_code":"USD","in_stock":false},{"title":"1\"","offer_id":68010632282387,"sku":"DRB01000","price":96.95,"currency_code":"USD","in_stock":false},{"title":"1-1\/2\"","offer_id":68010632315155,"sku":"DRB01500","price":96.95,"currency_code":"USD","in_stock":false},{"title":"2\"","offer_id":68010632347923,"sku":"DRB02000","price":136.42,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/8233\/4483\/files\/DRB01250.jpg?v=1794531487","url":"https:\/\/shopmanu.com\/products\/alpha-1-1-4-or-1-3-8-dry-core-bits-for-granite-eng-stone","provider":"Manu","version":"1.0","type":"link"}